Is CVE-2017-7964 actively exploited?

No active exploitation of CVE-2017-7964 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-7964 be exploited remotely?

Yes. CVE-2017-7964 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-7964?

CVE-2017-7964 has a CVSS score of 10.0 (CRITICAL).

HOME VULNERABILITIESCVE-2017-7964

CRITICAL

CVE-2017-7964

CWE-1188Published: April 19, 2017· Updated: Jun 17, 2026

10.0

CVSS v3.1

Official Description

Zyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin accounts, which makes it easier for remote attackers to conduct DNS hijacking attacks by reconfiguring the built-in dnshijacker process.

NVD Source

Technical Analysis

CVE-2017-7964 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 10.0.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.